Valve-operating mechanism



Nom 6 '11923. 3,47%@77 G. l.. BULL VALVE OPERAT ING MECHANI SM Filed April 16. 1921 l l I I l l l I i. l l l l l mivA s l lllllllllu kk ,4 u "will (g1/Wenko@ 17 @my L. Bm

Strunz Patented Nov. 6, 1923.

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GEORGE L. BULL, O1" OAKLAND, CALIFORNIA. n

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Application ined April 1e, 1921. serial N0. 461,196.

Opera-ting Mechanism, of which the follow- `in is a specification.

y invention relates to improvements iu valve-operating means for internal combuS- tion engines, andl contemplates a .hydraulic valve operating system particularly adapted to pump the oil in the engine crankA case sump into valve-operating cylinders which operate Vthe engine intake and exhaust valves.

Referring (to the annexed drawing in which my invention is illustrated and which forms a part of this specification:

Figure 1 is a` vertical section of an internal combustion engine embodying my valve operating system.

Figure 2 -is a cross section of the timing valve taken on line 2 2 of Figure 3.

Figure 3 is a longitudinal section of the timing valve.

Figure 4 is a cross section of the timing valve taken on line 4 4 of Figure 3.

Figure 5 is a view of the timing valve shaft, show-ing the advance and retard clutch grooves in the sections thereof and the clutch pins in said grooves.

.ln the drawing 1 indicates the crank case; 2 the crank case sump; 3 the crank shaft;'4 the intake valve; and 5 the exhaust valve of an internal combustion engine.

1 ln the top of the engine casing are I mounted two cylinders 6 and 7 which are closed only at their upper ends. Pistons 8 and 9, which are secured to the stems 10 and 11l of the' valves 4 and 5, reciprocate in the cylinders 6 and 7 respectively. Springs 12 and 13 surrounding the valve stems 10 and 11, bear at their lower ends upon thehead of the engine cylinder and at their upper ends against the pistons 8 and 9 respectlvely.

l ln the engine crank case 1 is mounted a pump 14 which is operated by an eccentric 15 secured on the crank shaft 3. A pipe 16 leads from said pump to a pressure tank 17. In hearings 18 and 19 in the sides of the crank case below the crank shaft 3 is journaled a shaft 20 which is made in two sections 21 and 22, .the section 22 telesco ing within the 'section'.21'and havinga shou der 23 formed thereon which engages the end of the section 21. In the sections 21 and 22 at their meeting point are. cam groove 24 and longitudmal groove 25 respectively. vA clutch 26 surrounds the vshaft 20 at the meet'- .ing point ofth'esections 21 and 22, from the inner surface of which'clutch extends pins 27 and 28 respectively intoI the grooves 24 and 25. The' clutch 26 has an annular groove 29 in its periphery in which fits the ring endof a lever 30. A timing valve 3].

is mounted on the shaft section 21, said valve p including a'valve cone 32 which is secured on the section 21 and a conical valve casing 33 which surrounds said valve cone and is secured in standards 34 upstanding from the bottom of the sump 2. -On the shaft section 22 within the crank case 1 issecured a pinion' 35 which meshes with a gear 36 secured on the crank shaft 3 also within the crank case, whereby the shaft 20 and valve cone 32 are rotated b the crank shaft 3, the clutch 26 causing t 'e shaft section 21 to rotate with `the section 22. .Pipes 37 and-38 lead from the tank 17 into thevalve casing 33. 4 Pipes 39 and 40.1eadnfrom the valve casing 33 into theupper ends of the cylinders 6 and 7 respectively. The pipes 37, 38, 39 and 40 are fitted in the valve casing 33-in longitudinal alignment. Pipes 41'and 42 lead from the pipes 39 and 40 into the valve casing 33 at points 90 from the point of connection of the pipes 37, 38, 39 and 40 with the casing.l Outlet pipes'43 and 44 lead from the valve casing at points90o. from the points of connection ofthe pipes 37 to 40 inclusive with the valve casing. 'Ports 45 and 46 are providedin the eriphery of the valve cone 32, the port 4g adapted to register first with thefpipes, 3 and 39 and then with the pipes -41 and 44, and the port 46 being adapted to register first with the pipes 38 and 40 and'th'en with the pipes 42 and 43. i

The operation of my invention; islas follows: l

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The rotation of the crank operates oil from the sump -2 .into thai-pressure tank 17. Duringltlie rotationof the'valve cone` 'vv 32 when the '-'por-t 45 registers with pipes 37 and 39, oil is forced 'from the tank 17 through pipe 37, port 45, and pipe 39 into the upper endof cylinder 6,' and opens the aio l i l, v#1,473,077.

yintake valve 4 to admit gas into the Aengine der 6 through pipes 39 and 41 into the port 45, "which at this vtime registers with pipes 41 and 44, and fronLsaiel port out through' outlet pipe 44 back into the sump 2. 0n the exhaust stroke of the engine the port 46 registers with pipes 38 and 40, whereupon oil isorced from the tank 17 through pipe 38, port 46. and pipe 40 into the cylinder 7 and the exhaust valve 5 is opened'to allow the products of combustion to escape. When the port 46 passes the pipes 38 and 40 and registers with the .pipes 42 and 43 the exhaust valvey 5' closes under the influence of its spring 13 and forces the oil out of cylinder 7 through pipes 40 and 42; ports 46 and pipe '43 into the sump 2a This coinpleles the cycle of operations. n v

By shifting the clutch 26 the pin 27 erigaging the slot,24 turns the shaft section 2l and valve cone 3 2 with relation to the section 22 andV advances or retards the opening of the valves l rlhe lateral motion of the clutch4 26 in the grooves 24 and25, causes the section 2l to rotate and vary the timing of the` valves. Having described my invention, l claim; hln an internal combustion engine, the combination with the intake and exhaust valves of the engine, and hydraulic means for operating said valves said hydraulic means including a shiftable clutch.

2. ln an internal combustion engine, the combination with the crank case and intake and exhaust valves of the engine, of hydraulic means for utilizing the'oil in the crank case for operating said valves.

3. ylin combination with the intake and exv haust valves of an internal combustion engine, a piston connected to the stem of each ot said valves, a cylinder in which each of said"y pistons reciprocates, a pressure tank, a pump for pumping liquid into said pressure'tank,l a valve, pipes leading from said -tinkinto said valve, pipes leading .from said valve into said cylinders respectively,

exhaust ipes leading respectively froml said latter pipes into said valve, outletipipes leading from said valve -into the crank case,

yand means for operating said valve to allow the oil to passl from said tank through the vareclosed, through the pipes leading into said cylinders and through saidexhaust pipes and said outlet pipes.

4. 'In an internal v, combustiori"enlgiina thel combination with the intake and exhaust valves of the engine, of hydraulic means for operating said valves, and means foradjusting the h draulic. means to advance or retard the opening of the valves.,v

5.' n combination with the crank case, crank shaft, intake valve andexhalust valve of an internal combustion engine, a piston connected to the stem of each of said valves,

a cylinderin which each of said pistons 'reciprocates, a pressure. tank, apump operated by the engine crank shaft for pumping oill 'from the engine crank case sump into said ressure tank, a valve shaft journaled in said crank case, a valve including a valve cone secured on said valve shaft and a valve casing surrounding said Valve cone, two' pipes leading-from said pressure tank into said valve casing, two pipes leading from said valve casing into said cylinders respectively, exhaust pipes leading from said latter pipes respectively into said valve casing, two outlet pipes leading from said valve casing, tWo ports in said valve' cone, a gear on the engine crank shaft, and a pinion on said valve shaft meshing With said gear for rotating said valve cone tie cause one of said ports first to register with one pipe leading from sai'd tank and one pipe leading to one of said cylinders, to admit oil into said cylinderto open the intake valve, and then to register with the exhaust pipe leading from said pipe leading from said cylinder and with one of said outlet pipes, to allow' the oil to exhaust from said cylinder into the crank case, and to cause the other valve port to register, first, with the other pipe leading from said tank andthe other pipe leading to the other cylinder, to admit oil to said cylinder to open said-exhaust valve, and then to register with said other exhaust pipe and other outlet pipe to allow the oil4 to exhaust from said other cylinder into said crank case.

6. In, combination with the crank rase, crank shaft, intake valve and exh'aust valve of an internal combustion engine, a piston` connected to the stem of each of said valves,

a cylinder in which each of said pistons reciprocates, a pressure tank, a pump operated by the engine crank shaft for pumpinv oil from the engine crank case sump into said pressure tank, a valve shaft journaled in said crank case, said valve shaft being formed in two telescoping sections, said sections being formed with a longitudinal groove and a cam groove respectively, a clutch surrounding said shaft at the joint between said sections, pins on said clutch engaging said ooves respectively, a valve including a va ve cone secured on one of -said shaft sections and a valve casing sur rounding said cone, two pipes leading from said pressure tank into said valve casing, two pipes leading from said valve casing into' said cylinders respectively, exhaust .pipes leading from said latter pipesrespectively into said valve casing, tlwo outlet pipes leading from said valve casing, two ports in said valve cone, a pinion on the other section of said Valve shaft, and a gear on the engine crank shaft meshing with said pinion for rotating said valve cone to cause one of said ports flrst to register with one pipe leading from said tank and the pipe leading into the cylinder for operating the engine intake valve, and then to register with the exhaust pipe, leading from said pipe which leads to said intake valve operating cylinder, and with one of said outlet pipes, and to cause the other cone port to register first with the other pipe leading from said tank to the valve casing and the pipe leading from said casing into the engine exhaust valve operating cylinder, and then to register with the other exhaust pipe and the other outlet pipe.

7. In an internal combustion engine, the combination with the intake and exhaust valves of the engine, of hydraulic means for operating said valves, said last named means including a clutch.

8.- In an internal combustion engine, the combination with'the intake and exhaust valves of the engine, of hydraulic means for operating said valves, said last named means including a shaft made in two sections, one of which telescopes within the other so as to permit of relative rotation of the two sections.

v9. In an internal combustion engine, the combination with the intake and exhaust valves of the engine, of hydraulic means for operating said valves, said last named means includin of whic telescopes within the other, one section having a camvgroove in its outer periphery, the other section having a longia shaft made in two sections, one

tank, a timing valve, pipes leading from the pressure tank to the timing valve whereby the Huid is conducted from the pressure tank to the -timing valve.

11. In an internal combustion engine, the combination with the intake and exhaust valves of the engine, hydraulic means for operating said valves, said hydraulic means including a pressure tank, a pump, means to operate the pump, a pipe connecting the pump and pressure tank whereby the fluid under pressure is carried to the pressure tank, a timing valve, pipes leading from the pressure tank to the timing valve wherebythe fluid is conducted from the pressure tank to the timing valve, said timing valve includin a valve cone having ports therein, pipes Ieading from the timing valve to the cylinders through which the fluid alternatelyl flows, pipes connecting the last mentioned pipes and other ports in the timing valve through which the Huid is returned to the timing valve, a crank case sump and outlet pipes from the timing valve whereby the fluid is returned from .the timing valveto "the crank case sump.

In testimony whereof I affix m signature.

GEORGE BULL. 

